1 files changed, 38 insertions, 0 deletions

diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index 094cfc1f3a19..5267b006c5c8 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -2872,3 +2872,41 @@ int patch_lm4550(struct snd_ac97 *ac97)
         ac97->res_table = lm4550_restbl;
         return 0;
 }
+
+/* 
+ *  UCB1400 codec (http://www.semiconductors.philips.com/acrobat_download/datasheets/UCB1400-02.pdf)
+ */
+static const struct snd_kcontrol_new snd_ac97_controls_ucb1400[] = {
+/* enable/disable headphone driver which allows direct connection to
+   stereo headphone without the use of external DC blocking
+   capacitors */
+AC97_SINGLE("Headphone Driver", 0x6a, 6, 1, 0),
+/* Filter used to compensate the DC offset is added in the ADC to remove idle
+   tones from the audio band. */
+AC97_SINGLE("DC Filter", 0x6a, 4, 1, 0),
+/* Control smart-low-power mode feature. Allows automatic power down
+   of unused blocks in the ADC analog front end and the PLL. */
+AC97_SINGLE("Smart Low Power Mode", 0x6c, 4, 3, 0),
+};
+
+static int patch_ucb1400_specific(struct snd_ac97 * ac97)
+{
+        int idx, err;
+        for (idx = 0; idx < ARRAY_SIZE(snd_ac97_controls_ucb1400); idx++)
+                if ((err = snd_ctl_add(ac97->bus->card, snd_ctl_new1(&snd_ac97_controls_ucb1400[idx], ac97))) < 0)
+                        return err;
+        return 0;
+}
+
+static struct snd_ac97_build_ops patch_ucb1400_ops = {
+        .build_specific = patch_ucb1400_specific,
+};
+
+int patch_ucb1400(struct snd_ac97 * ac97)
+{
+        ac97->build_ops = &patch_ucb1400_ops;
+        /* enable headphone driver and smart low power mode by default */
+        snd_ac97_write(ac97, 0x6a, 0x0050);
+        snd_ac97_write(ac97, 0x6c, 0x0030);
+        return 0;
+}